Joiner s plane



NITED Sterne WILLIAM TIDGEWELL, OF MIDDLETOWN, ASSIGNOR TO THE MERIDENMAL- LEABLE IRON COMPANY, OF MERIDEN, CONNECTICUT.

'JOINERS PLANE.

E PECIFICATION forming part of Letters Patent N0. 313,694, dated March10, 1885.

Application filed February 2, 1885. (No model.)

To all whom it may concern:

Be it known that I, \VILLIAM TIDGEWELL, of Middletown, in the county ofMid llesex and State of Connecticut, have invented anew Im- 5 provementin Joiners Planes; and I do hereby declare the following, when taken inconnection with accompanying drawings and the letters of referencemarked thereon, to be a full, clear, and exact description of the same,and

I which said drawings constitute part of this specification, andrepresent, in

Figure 1, a longitudinal vertical section; Fig. 2, an undersideviewot'thestock; Fig. 3, a transverse section through the stock, lookingI on the face of the bearing D.

This invention relates to an improvement in that class of joiners planesin which the stock is made from .cast metal, and in which the cutter ismade adjustable by mechanical appliances. In the usual construction ofthese planes the cutter takes a bearing upon the stock at the mouth, thebearing extending up a c0nsiderable distance on the back of the cutter.This bearing-s11 rface is usually smooth,and the cutter fits close uponit. The result of this bearing is to create a very great friction between it and the cutter, owing to the pressure which is brought upon thecutter at the bearing in the clamping operation, so that when the cutteris so clamped a very considerable force is necessary to be applied tothe adj usting device to move the cutter.

The object of my invention is to diminish this friction while stillretaining practically the same extent of bearing; and it consists in terupon its seat D; G, the movable bed to which the cutter is also clamped;H, the adjusting device applied to the bed or slide G, and by which saidslide and cutter are moved to adjust the cutter.

The clamping device, bed, and adjusting device may be any of the knownconstructions.

The face of the bearing D, instead of being made flat, is corrugated, asseen in Fig. 3, so as to form a series ofribs, a a, more or less innumber, these ribs forming a series of narrow bearings, upon which thecutter will rest and its proper position be insured, yet over which itwill easily move under the action of the adjusting devices.

As here represented, the area of all the ribs amounts to about one-thirdof the area of the bearing. The friction therefore is reducedaccordingly; but still the same firm support is given to the cutter.These grooves should terminate near the bottom surface of the stock, orat about where the bevel at the edge ofthe cutter begins, as seen inFigs. 1 and 3. These grooves may be formed in casting, the ribssubsequently dressed to finish the bearing for the cutter.

In the illustration I have showna construc -tion of plane which permitsof but a short bearing for the lower end of the cutter; but in 7 5 otherwell-known constructions the extent of bearing is very much greateryevento forming the entire support for the cutter. The advantages of myinvention increase as the extent of the bearing increases.

I claim In a joiners plane in which the stock is of cast metal, and inwhich the cutter is made adjustable, the bearing D in the rear of themouth, and which supports the cutter, constructed to form a series ofribs upon its face, and upon which ribs the cutter will rest, substantially as described.

WVILLIAM TIDGEWELL.

Witnesses:

GEo. W. SMITH, ELI I. MERRIMAN.

